Some lenses change apparent focal length during focus due to their optical design.
Some lenses change their apparent focal length as you move from infinity to near focus. This phenomenon is called “focus breathing.” In the video above, I demonstrate what this looks like using the Nikon 50mm f/1.8G and Nikon 50mm f/1.8S lenses on a Nikon Z7 mirrorless camera.
Updating the firmware on a Nikon Z mirrorless camera is fairly straightforward. To do so, you’ll need:
A formatted XQD memory card
An XQD card reader for your computer
A fully charged EN-EL15 battery
Nikon firmware update file
After downloading the firmware update, copy the binary (.bin) file to the ROOT (main) directory of the XQD card. Put the card in your camera and navigate to the Firmware Version option in the Z6 or Z7’s SETUP (wrench icon) menu. Follow the on-screen prompts to update your firmware to the current version (currently 2.10).